Power press



8. J. YANCHENKO Oct. 20, 1925.

POWER PRES S Filed Feb. 6, 192i) INVENTOR Basil lysine/Lenka BY 66%, W

TORNEY Patented Oct.- 20, 1925.

UNITED STATES PATENT OFFICE.

BASIL J'. YANCHENKO, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO LIBERTY NATIONAL BANK, TRUSTEE, OF SYRACUSE, NEW YORK.

POWER PRESS.

Application filed February 6, 1925. Serial No. 7,238.

To all whom it may concern:

Be it known that I. BAsn. .T. YANCIUZNKO,

for garment seam and edge pressing work where considerable pressure is required.

An object of this invention is to produce a power press in the nature of an ironing machine for laundries and the like which machine is provided with wide opening jaws affording extended visibility of the work and a particular purpose is to produce a power press of very simple construction wherein a freely swinging cam member travels over a drive roller for a predetermined period of time to maintain compression between the jaws on the work and when the cam reaches the end of its travel and the compression period is completed the pressing. jaws are then automatically opened-and I provide improvements in structure and mode of operation for securing these results.

Among other things, an important object of the invention is to employ a continuously runnin motor without resorting to the use of a cliltch which is o't'ttimes employed in powerpresses to acquire the necessary start and stop motion. I acquire the stop and start motion by an improved roller and cam combination and in doing so I take advantage of economy in employing a continuously running motor and eliminate the disadvantage .ordinarily attending clutches and similar mechanisms. Thus by using a continuously running motor without a clutch.

. I greatly simplifypower presses and ironers.

The accompanying drawing illustrates an example of the invention serving to illustrate its principle and mode of operation and it is to he understood that changes may be made without departing from the principles involved.

Figure 1 illustrates aside view of the press in closed position with the power cam in initial position at the time it starts to. applying pressure. In this view the several positions of the cam are shown in dotted mes.

Figure 2 illustrates a rear fragmentary view of the press as observed from the back side of the machine and shows a gap or passage in the cam by which it traverses or moves laterally across the power roller duringithe opening movement of the press.

eferring further to the drawing for a v more detailed description of the invention there is shown a press frame 10 supporting a lower ironing or pressing buck 11 and which is adapted to receive the work which is pressed or ironed by the head 12. The ressing or jaw members 11 and 12 are suitably heated'as by steam or otherwise. "A press lever 14 is pivoted at 15 on the frame 10 and a handle 16 projects forwardly in a position convenient to the operator whereby he may draw the head jaw 12 downwardly upon the work and buck 11. i

A two armed swing link 18 is pivoted at 19 on the rear end of the press lever and a counterbalance weight 20 is attached to the upper end of the swing link 18.. This weight 20 serves not only to aid in balancing the-- 'member as will be described.

A cam 22 is suspended from the swing link 18 and adjustable nuts 23 are employed to lock the cam 22 in pro or position on the swing link. By adjusting the cam 22 up and down upon the link 18 followed by looking it with the nuts 23, the said cam 22 is held in proper osition as respects a continuously motor riven roller to be described, and which is driven by a continuously running motor.

A roller 24 is fixed upon a shaft 25. The shaft 25 is journaled in a gear reductlon housing 26 and a working" face 2'8 of the cam 22 travels across the roller 24 in executlng the pressing operation. A motor 28 drives through a shaft 29 into the gear housing 26 and a drive inion 30 is fixed to the shaft- 29 on the insi e of the housing which meshes with a gear3l adapted to drive a worm pinion 32'meshing with a worm wheel 33, and the shaft 25 carrying the roller 24: is fixed to and slowly driven 33.

The power driven roller 24- turns at relatively slow speed by reason out the suitable by the said worm wheel gear reduction contained within the housing 26 and interposed between the motor 28 and finally driven roller 24. Inasmuch as the roller 24 travels at substantially low peripheral speed, it follows that .the cam face 27 dwells or prolongs its engagement with the roller 24 for a predetermined time thereby maintaining the period of compression on the work between the press jaws.

The cam is made with an offset gap or passage 36 which offsets the upper portion of the cam member 22 away from the roller 24 with the result that the cam may traverse or swing laterally across the roller from its lower dotted line cam position 37 to the upper dotted line cam position 38. The passage 36 through the cam permits this movement from said rearwardly low swinging position 37 to the forwardly upper position 38 and the weight 20 acts upon the cam 22 to urge it forwardly to the said upper dotted line cam position 38 because, as already explained, the said'weight 20 overbalances the cam 22causing it to swing across the roller 24 without interference therewith by reason of the ample clearance afforded between the roller and the cam and such clearance is provided by the cam passage 36 which reaches alignment with the roller 24 when the head 12 is up.

As an effective safety means to keep both hands of the operator busy during the head closing stroke, a plunger 40 is reciprocably mounted in the frame 10 and subjected to forward pressure by a spring 41 confined thereon and pushing against a collar 42 fixed on the plunger 40. The rear end of the plunger carries a roller 43 and this roller bears against the front vertical edge 17 of the cam .22 by reason of the operator thrusting rearwardly on the ball handle 43 which is the position shown in the drawings. The operator may continuously urge the roller 43 rearwardly thereby causing it to bear against the cam 22 so as to overcome the overbalancing effect of the weight 20 thereby causing the rear vertical cam edge 21 to approach and bear against the rotating roller 24. Inasmuch as the continuously running roller 24 now rests in engagement with the rear vertical edge 21 of the cam 22 and held thereby the manually pressed plunger 40 it follows that this roller 24 exerts an upwardly driving or lifting tendency on the cam 22 which aids the operator in drawing down the head 12. The smooth engaging friction surface of the roller 24 and cam edge 21 are ordinarily preferably not quite sufficient to cause the cam 22 to be bodily lifted and so the jaw is notdriven down against the back 11 by virtue of the power roller 24 but this friction between the roller 24 and rear verticaledge 21 of the cam is suiiicient to aid theoperator in closing the head when the operator places his other hand on the closin handle 16 and bears slightly thereon, and this results in a great advantage by reason of saving the operators strength besides compelling the operator to use both hands to close the press for safety. The member 24 is elongated in shape with one end carrying the cam surface 27 and the other end having pivotal means as shown.

In the operation of the power press, it is observed that the counterbalance weight 20 together with the cam 22 is sufficient in total weight to lift the head 12 high above the buck 11 as well as over-balance the cam 22 causing it to swing from lower position 37 to upper position 38. Therefore in starting to use the press, the head jaw 12 is usually up which means that the cam 22 is also resting in up position indicated by the numeral 38. Likewise the spring pressed roller 43 is forwardly displaced to the right by the thrust of the spring '41 urging the plunger wardly with his other hand on the handle 43,

causes the head to travel downwardly toward the buck.

The result of the head closing motion is to cause the cam edge 21 to climb or run up the roller until the lower left hand corner of the cam reaches a position tangent to roller 24 whereupon the roller 24 immediately takes hold of the cam surface 27 there by causing the lower end of the cam to begin traveling rearwardly under the friction and driving influence of the roller 24. The pressure gently increases as the cam surface 27 traverses the roller and becomes normal after the cam is well upon the roller and remains uniform throughout the period required for the cam to complete the travel over the roller 24. When the cam surface 27 reaches the end of its travel, the right hand corner of the cam is driven off the roller and swings rearwardly which permits the combined weight of the part 20 and cam' 22 to throw up the head 12 thereby exposing the ironed work; I

An important feature of the operation rests in the fact. that the inception of the compression period and the final movement of the compression period is executed with marked simplicity and quietness inasmuch as the cam face 27 graduallv starts or builds up and gradually ends or diminishes. Thus the head quietly but rapidly approaches maximum compremion and dwells there under compression for a period of time equal to that required to permit the roller 24 to drive the cam 22 all the way thereacross and the period'of dwell is dependent upon the speed of the roller 24 and the length of the passage 36 then becomes aligned with the' roller. Clearance now exists as between the roller and cam with the result that the cam 22 swings up past the roller thereby causing the rear cam face 21 to now stand to the right of the roller and away from it ready to repeat the operation hereinbet'ore described so soon as the operator applies both hands to the two main control parts, the handle 16 and the starter knob 43.

Inasmuch as the motor continuously runs and since there are no stop and start switches and clutches, it follows that the pressing machine is of marked simplicity; it is quiet in operation and is simple to manipulate.

WVhat I claim is:

1. A power press comprising in combination, cooperating wide opening press jaws, a cam associated with the press jaws to produce compression thereinbetween, means as sociated with the cam urging it to an inoperative position, a motor driven roller continuously revolving and adapted to cooperate with-the cam, means to permit the cam to pass by the roller without being acted on by said roller, and a manually actuated control handle operable by the operator to throw the cam into engagement with the roller.

2. A power press comprising in combination, cooperating wide opening pressjaws,

a press lever carrying one press jaw and adapted to actuate this jaw relatively to the other, a cam attached to the press lever, a.

motor driven roller continuously revolving and adapted to cooperate with the cam to drive it in one direction to produce jaw compression, a passage formed'through the cam enabling it to travel past the roller in the other direction .to seek an inoperative position of rest, a handle on one press jaw by which the press is closed by one hand of the operator, and means operable by the other hand of the operator which cooperates with the swinging cam to causethe cam to engage the roller after the press is closed.

3. A power press comprisingin combination, cooperating wide opening press jaws, a press lever carrying one press jaw and adapted to operate said jaw relatively to the other jaw, a cam swingably attached at one end thereof to the press lever, means associated with the cam urging it normall' 'upwardly, a continuously rotating motor riven roller adapted to cooperate with the swing; ing cam to produce jaw compression, and means forming part of the cam structure enabling it to pass by the roller and return tonormal inoperative position.

4. A power press comprising in combination, cooperating wide opening press jaws, a press lever carrying one press jaw and adapted to open and close the press, a cam swingably attached atone end thereof to the press lever and adapted to impose pressure on the lever after the press closes, means associated with the cam urging it normally upwardly to an inoperative position, a motor driven roller continuously revolving and adapted to'cooperate with the swin ing cam .to drive it in one direction to pro uce pressure as aforesaid, means forming part of the cam structure enabling it to pass by the roller with clearance without being operated on thereby while the cam is moving to its inoperative position, a handle carried on the press jaw by which the press is closed by one hand of the operator, and means operable by the other hand of the operator which cooperates with the swinging cam to cause the cam to be picked up and acted on by the roller after the press is closed. y

5. A pressing machine comprising incombination, a frame,'cooperating wide opening work jaws between which the work is pressed, a press lever fulcrumed in the frame and having one end thereof attached to a jaw to open and close the press by .a swinging up :and down lever motion, a cam pivotally connected with the other end of the press lever and adapted to swin up and down, a motor driven roller whic may engage the cam when the lever swings to close the press, manually operable means. to urge the cam upon the roller after the press closes thereby causing the cam to traverse the roller, and means acting on the cam and press lever causing the the cam traverses the rol er andcausing the cam to return to a normally inoperative position ready for the next pressing operation.

6. A pressing machine com rising in com= bination, a frame, afpre'ss ever pivotally carried in the frame, jaws opened wide and closed by the lever, an elongated member having a cam surface at one end and being pivotally connected at the other end to the press lever, a motor-driven roller slowly revolving in engagement with the cam surface for a predetermined time to produce jaw compression through the lever, a weight caress. to, open after v closed by the lever, an elongated member having a cam surface at one end and being pivotally connected at the other end to the press lever, a motor driven roller slowly revolving in engagement with the cam surface for a predetermined time to produce jaw compression through the lover, a weight carried by the lever and by the member which causes said member to move away from the roller and open the press at the end of the predetermined pressingperiod, and an offset passage made through the elongated member which permits'it to swing past the roller to find its inoperative position.

8'. A pressing machine'comprising in combination, motor means, a drive member connected with the motor means, a cam made with a working surface adapted to traverse the drive member which forces the cam to one side of the drive member, means form- 25 ing part of the cam structure which enables it to travel back to its original position without being acted on by the drive member,

pressing jaws adapted to be acted on by the cam, and a manually operable device to start the cam working surface across the drive member to produce aw compression.

10. A pressing machine comprising in combination, motor means, a drive member connected with the motor means, a cam made with a working surface adapted to traverse the drive member which forces the cam to one side of the drive member, means forming part of the cam structure which enables it to travel back to its original position without being acted on by the drive member, pressing jaws adapted to be acted on by the cam, a handle on which the operator places one hand to close the press, a safety control member operable by the other hand of the operator to start the cam in engagement with the drive member.

11. A power presscomprising in combination, cooperating pressing jaws, a press lever to open and close the jaws, a two-armed swing link' pivoted on the lever, an elongated cam member anchored to onearm of the swing link, motor means, apower member drlven thereby, said cam having a working face adapted to travel over the power member causing the cam to produce aw compression while travehng in one direction, and aweight fixed on the other arm of the swing link and adapted to urge the press open and'urge the cam away from the power member when the cam completes its travel.

In testimony whereof I aflix my signature.

BASIL' J. YANCHENKO. 

